Good time of day.Please tell me, I am currently repairing the agent E3632, there are doubts about the operability of the U7 chip on the front panel. The device turns on and emits two beeps, the display does not light up. I want to replace it with atmel, but I can't find the firmware. I found a file from KO4BB similar to 3646, but I can't download the file, writes that it was not found. Maybe someone has a firmware with N80C51BH 34401-88804 or something similar for testing. I used a translator, please do not scold for mistakes.